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Notchless encodes a novel WD40-repeat-containing protein that modulates Notch signaling activity.

ABSTRACT: Signaling by Notch family receptors is involved in many cell-fate decisions during development. Several modifiers of Notch activity have been identified, suggesting that regulation of Notch signaling is complex. In a genetic screen for modifiers of Notch activity, we identified a gene encoding a novel WD40-repeat protein. The gene is called Notchless, because loss-of-function mutant alleles dominantly suppress the wing notching caused by certain Notch alleles. Reducing Notchless activity increases Notch activity. Overexpression of Notchless in Xenopus or Drosophila appears to have a dominant-negative effect in that it also increases Notch activity. Biochemical studies show that Notchless binds to the cytoplasmic domain of Notch, suggesting that it serves as a direct regulator of Notch signaling activity.

SUBMITTER: Royet J

PROVIDER: S-EPMC1171080 | biostudies-other | 1998 Dec

REPOSITORIES: biostudies-other

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Notchless encodes a novel WD40-repeat-containing protein that modulates Notch signaling activity.

Royet J J Bouwmeester T T Cohen S M SM

The EMBO journal 19981201 24

Signaling by Notch family receptors is involved in many cell-fate decisions during development. Several modifiers of Notch activity have been identified, suggesting that regulation of Notch signaling is complex. In a genetic screen for modifiers of Notch activity, we identified a gene encoding a novel WD40-repeat protein. The gene is called Notchless, because loss-of-function mutant alleles dominantly suppress the wing notching caused by certain Notch alleles. Reducing Notchless activity increas ...[more]

PMID: 9857191

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